This release fixes a bunch of bugs, gives better feedback on what it is doing, and improves the built-in document converters. The document converters are now also separate plugins (any developers who think they want to write one, all you have to do is implement an IHtmlConverter object in a DLL that has a name starting with "write"; it's pretty simple and you can contact me if you want more info).

Because there are a lot of changes under the hood, I've left release 19 up too in case people have issues, but I believe this release to be much better.